Soil gas radon and thoron measurements in some Venezuelan oilfields

Fernandez, D. P.; Fusella, Emidio; Avila, Yininber; Salas, Jhonny; Teixeira, Diana; Fernández, Guillermo; Sajó-Bohus, L.; Greaves, E.D.; Barros, H.; Bolivar, Manuel; Regalado, Jimmy

doi:10.1007/s10967-015-4354-4

Cited by 8 publications

(2 citation statements)

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“…Carbonic acid in groundwater produced by the decomposition of hydrocarbons can also leach potassium and uranium from the soil. The concentration of uranium depends on a dynamic equilibrium between the rate of leaching and the amount of enrichment, while the potassium concentration always decreases due to leaching [53,65], a phenomenon that could also explain the lower concentration of potassium in the area surrounding the oil seep. Since 222 Rn has a longer half-life (T 1/2 = 3.82 d) than thoron (T 1/2 = 55.6 s), the radon/thoron ratio can indicate whether gases are transported from greater depths through a fault system or they have a local origin.…”

Section: Discussionmentioning

confidence: 99%

Soil Gas Measurements of Radon, CO2 and Hydrocarbon Concentrations as Indicators of Subsurface Hydrocarbon Accumulation and Hydrocarbon Seepage

et al. 2021

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Soil gas measurements of radon (222Rn), CO2, and hydrocarbon concentrations, as well as gamma-ray spectrometry, were conducted at two separate locations to estimate the measurement results for known locations of hydrocarbon accumulations in the subsurface and oil seepage on the surface. The aim of the study was to confirm the applicability of the method for identifying migration pathways (e.g., faults) and to detect possible seepages of hydrocarbons to the surface as well as to investigate possible health issue potential about the soil gas analysis results. Site A investigations were performed with a large number of sampling points to provide sufficient spatial coverage to capture the influence of subsurface lithologic variability as well as the influence of the migration pathway on the measured parameters. For the investigation of site B, sampling points were positioned to reflect the situation between the area above producing hydrocarbon fields and areas with no confirmed accumulation. The results presented show that it is possible to distinguish the near-surface lithology (gamma-ray spectrometry), characterize the migration pathway, and indicate the area of oil seepage at the surface. Areas above the known hydrocarbon accumulations generally have elevated radon concentrations and detectable heavier hydrocarbons with sporadic methane in soil gas, which contrasts with the lower radon levels and lack of detectable heavier hydrocarbons in soil gas in the area with no confirmed hydrocarbon accumulation in the subsurface.

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Section: Discussionmentioning

confidence: 99%

Soil Gas Measurements of Radon, CO2 and Hydrocarbon Concentrations as Indicators of Subsurface Hydrocarbon Accumulation and Hydrocarbon Seepage

et al. 2021

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“…Mención especial requieren los estudios realizados en Venezuela, con el objeto de evaluar la correlación entre la concentración de radón y los yacimientos. Palacios, et al, (2016), publicaron los resultados de varios estudios realizados en campos petrolíferos venezolanos.…”

Section: Aplicaciones Del Radón Para Prospección De Hidrocarburos En ...unclassified

Aplicaciones del radón como trazador en la industria petrolera

Angulo Saldiña,

Hernández Annette,

Núñez Othón

2024

revistaingenieria

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El radón es un elemento radiactivo, gaseoso, más denso que el aire, inodoro e insípido. Al ser producto del decaimiento radiactivo del uranio 238, debido a su asociación con la materia orgánica, está presente en forma natural en sistemas petrolíferos. De ahí que nos hayamos planteado como objetivo profundizar sobre la aplicabilidad del radón en las etapas de exploración y producción de la industria. El estudio constituye una investigación básica, en la que se realizó una revisión de literatura, para lo que empleó una investigación es cualitativa y se utilizó el método descriptivo-explicativo. La metodología empleada con enfoque inductivo que se nutrió principalmente de fuentes provenientes de plataformas académicas reconocidas, Science Direct, EBSCO, Cambridge CSA, One Petro, GeoScience Wolrd, entre otras y operadores boleanos: AND, OR y NOT. La revisión en bases de datos científicas, presenta las generalidades químicas y geoquímicas del 222Rn y muestra su utilidad como herramienta exploratoria de hidrocarburos desde superficie y como trazador de partición para la estimación de la saturación residual de crudos en producción, así como en caracterización de yacimientos y como soporte para la evaluación del progreso de proyectos de recuperación mejorada de hidrocarburos empleando vapor. Entre las ventajas en el empleo del radón resalta su presencia natural en el yacimiento, lo que evita el impacto ambiental, así como la sencillez y bajo costo de su determinación, potenciándolo como trazador natural en exploración y producción.

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Introduction

Sukanya

Joseph

2023

Environmental Radon

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Soil gas radon and thoron measurements in some Venezuelan oilfields

Cited by 8 publications

References 15 publications

Soil Gas Measurements of Radon, CO2 and Hydrocarbon Concentrations as Indicators of Subsurface Hydrocarbon Accumulation and Hydrocarbon Seepage

Soil Gas Measurements of Radon, CO2 and Hydrocarbon Concentrations as Indicators of Subsurface Hydrocarbon Accumulation and Hydrocarbon Seepage

Aplicaciones del radón como trazador en la industria petrolera

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